Sufficiency rhymes with:
self-sufficiency, proficiency, self-sufficiency, deficiency, efficiency, immunodeficiency, inefficiency, proficiency, self-sufficiency, deficiency, efficiency, immunodeficiency, inefficiency, proficiency, self-sufficiency
Sufficiency sounds like:
savaging, sobocinski, spacing, spasms, speaking, specimens, spicing, spiking, subconscious, suffusing, supposing, suspicions